［文字サイズの変更］
▼
▲
©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 次の等式を[ ]内の変数について解きなさい．
[180-00]
(1)
[
b
]
5
a
＋
5
b
=
8
(2)
[
r
]
2
q
＋
6
r
−
6
=
0
(3)
[
a
]
6
a
＋
8
b
=
2
(4)
[
q
]
6
q
＋
7
r
−
4
=
0
(5)
[
z
]
8
y
＋
2
z
=
3
(6)
[
y
]
5
x
＋
10
y
=
1
(7)
[
q
]
6
p
＋
4
q
=
8
(8)
[
a
]
10
a
＋
2
b
−
5
=
0
(9)
[
w
]
10
v
＋
2
w
=
5
(10)
[
b
]
4
a
＋
5
b
＋
2
c
=
2
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
[
b
]
5
a
＋
5
b
=
8
5
b
=
−
5
a
＋
8
b
1
=
(
−
5
a
＋
8
)
×
5
b
8
=
−
a
＋
5
(2)
[
r
]
2
q
＋
6
r
−
6
=
0
6
r
=
−
2
q
＋
6
r
1
=
(
−
2
q
＋
6
)
×
6
r
1
=
−
q
＋
1
3
(3)
[
a
]
6
a
＋
8
b
=
2
6
a
=
−
8
b
＋
2
a
1
=
(
−
8
b
＋
2
)
×
6
a
4
1
=
−
b
＋
3
3
(4)
[
q
]
6
q
＋
7
r
−
4
=
0
6
q
=
−
7
r
＋
4
q
1
=
(
−
7
r
＋
4
)
×
6
q
7
2
=
−
r
＋
6
3
(5)
[
z
]
8
y
＋
2
z
=
3
2
z
=
−
8
y
＋
3
z
1
=
(
−
8
y
＋
3
)
×
2
z
3
=
−
4
y
＋
2
(6)
[
y
]
5
x
＋
10
y
=
1
10
y
=
−
5
x
＋
1
y
1
=
(
−
5
x
＋
1
)
×
10
y
1
1
=
−
x
＋
2
10
(7)
[
q
]
6
p
＋
4
q
=
8
4
q
=
−
6
p
＋
8
q
1
=
(
−
6
p
＋
8
)
×
4
q
3
=
−
p
＋
2
2
(8)
[
a
]
10
a
＋
2
b
−
5
=
0
10
a
=
−
2
b
＋
5
a
1
=
(
−
2
b
＋
5
)
×
10
a
1
1
=
−
b
＋
5
2
(9)
[
w
]
10
v
＋
2
w
=
5
2
w
=
−
10
v
＋
5
w
1
=
(
−
10
v
＋
5
)
×
2
w
5
=
−
5
v
＋
2
(10)
[
b
]
4
a
＋
5
b
＋
2
c
=
2
5
b
=
−
4
a
−
2
c
＋
2
b
1
=
(
−
4
a
−
2
c
＋
2
)
×
5
b
4
2
2
=
−
a
−
c
＋
5
5
5